Join Date: Mar 2013
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Just changed oil to delo 5w-40. after the first drive I noticed a surge while idling. this was first oil change since buying the truck used. The previous change was done at a quick lube type place with a crap filter and I assume standard 15w-40. I know the vis. Is the same but new oil is synthetic. Would the switch cause the idle surge or a sign of another problem?
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1999 (early) F250 srw supercab longbed 4x4. automatic transmission.
2005 Harley Davidson Road King. V&H true duals/ monster ovals, PCV tuner, andrews 21 cams